Animation Key Frame Summary - Change editor text color
It's a long time since I changed mine but I think you'll find that setting in Preferences &gt; Themes &gt; Dope Sheet. Scroll down to 'Theme Space List', click the down arrow, and the setting should be under 'Source List Text'. If not, it's in 'Theme Space' settings above that section. Have a play with the colors (making a note of the current setting) and see what's changing in the interface.